Bioleaching process development and optimization to recover critical raw materials from sulfidic mining wastes - BRGM - Bureau de recherches géologiques et minières Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Bioleaching process development and optimization to recover critical raw materials from sulfidic mining wastes

Résumé

Bioleaching of sulfidic mine wastes from the Iberian pyrite belt was studied in the framework of the H2020 project RAWMINA to recover critical raw materials and to remove sulfides. The study focused on the process development and optimization, and on the understanding of the mechanisms involved. Bioleaching tests were performed using a microbial consortium (Leptospirillum ferriphilum, Acidithiobacillus caldus and Sulfobacillus spp.) in 2-L stirred tank reactors (STRs) maintained at 42 °C at different operating conditions (solid content, pH control and CO2-enrichment of the gas phase). Main results showed good recovery of Co (~100%), Cu (75%) and Sb (~50%), little effect of CO2 gas enrichment on the microbial growth and a negative influence of low pH (< 1) on iron oxidation kinetics. Then, two continuous STRs in series (total volume of 6-L) were used to test the optimized operating conditions. This test also allowed increasing microorganisms' resistance to low-pH.

Domaines

Biotechnologies
Abstract_RawminaBRGM_Biomining23.pdf (436.7 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-04017345 , version 1 (07-03-2023)

Licence

Identifiants

  • HAL Id : hal-04017345 , version 1

Citer

Douglas O. Pino-Herrera, Mickaël Beaulieu, Catherine Joulian, Anne-Gwenaelle Guezennec, Françoise Bodénan. Bioleaching process development and optimization to recover critical raw materials from sulfidic mining wastes. Biomining '23, MEI Conferences, Jun 2023, Falmouth, United Kingdom. ⟨hal-04017345⟩

Collections

BRGM
5 Consultations
6 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More